While stopping a bank robbery, Spider-Man spots a police chase that ends in a deadly pileup on the Queensboro Bridge. He clears the wreckage and tracks the fleeing vehicle to a warehouse packed with explosives, barely containing the blast. Later, Peter Parker's friend Harry Osborn introduces him to Dr. Otto Octavius, a nuclear physicist working on a fusion energy demonstration sponsored by Oscorp. Octavius manages hazardous materials using a harness of AI-driven robotic arms. When the public demonstration goes catastrophically wrong — killing his wife, destabilizing the reactor, and burning out the neural inhibitors suppressing the arms' AI — Peter shuts it down as Spider-Man, destroying Octavius's life work. Driven by the arms' growing influence on his mind, Octavius transforms into Doctor Octopus and sets out to complete his fusion experiment at any cost.